Method and apparatus for generating gear teeth



March 25, 1930.

0. 1G. SIMMONS METHOD AND APPARATUS FOR GENERATING GEAITTEBTH 18 Shee'ts-Sheen 1 Filed March 31, 1926 March 25, 1930. o, smmoNs 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 31, 1926 18 Sheets-Sheet 2 I s5 V l 56 6.9 Q 28 lNVli/VTOR:

March 25,-1930. o. G. SIMMONS 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed Iai'ch 31. 1926 l8 Sheets-Sheet 5 fi I 269 O Q 0 h 2 .99 @fii'i v Q 5 2 f 12 '1 1' I l I 1318: J

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March 25; 1930. o. G. SIMMONS 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 31, 1926 l8-Sheets-Sheet 4 l IYNVENTOR! mm w lp/ ATTORNEYS Marc h 25, 1930. o. G. SIMMONS 1,752,033

METHOD AND APPARATUS FDR GENERATING GEAR TEETH Filed March 31, 1926 18 Sheets-Sheet 5 I INVENTOE:

March 25, 1930.

mnon AND APPARATUS FOR GENERATING exam TEETH Filed larch a1. 1926 l8 sheds-sheet s INVENTOR J2 f 0K4 Kiwi. flab'xvzz ATTORNEYS V 0. G. slMMbNs 1,752,033 7 March 25, 1930. o. G. SIMMONS 1,752,033-

IETHOD AND APPARATUS FOR, GENERATING GEAR TEETH Filed larch 31. 1926 18 Sheets-Sheet W 62 "0 v 167 175 181 l 176 15 J42 I 143111 146, "132 a 146 166 I H I .168 111 2! 67 74 179 IN V/SNTOR ZM wmeiz March 25', 1930. 10. G. SIMMONS 1,752,033

METHOD AND APPARATUS FQR GENERATING GEAR TEETH Filed Iarh 31. 1926 Sheeti-Shi'et B I 7 my mvgmon w M a;

1 March 25, 1930. 1 0,6, SWQNS 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 31. I926 18 Sheets-Sheet 9 INVENTOR.

E March 25, 1930. I o. G. SIMMONS 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 31. 1926 18 Sheets-Sheet 10 INVENTOR March 25', 1930. I o. a. SIMMONS ,7 ,0 3

METHOD AND APPARATUS FOE GENERATING GEAR TEETH Filed March 31, 1926 18 Sheets-Sheet ll N on N 0 Q N x N a VEN O ramawww I March 25,1930.

0. G. SIMMONS METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 51. 1926 l8 Shets-Sheet 1 IINVENTOR:

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March 25, 1930.

METHOD AND AP PARATUS FOR GENERATING TEETH- Filed March 31, 1926 1a Sheets-Sheet 14 m VENTOR:

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METHOD. AND APPARATUS rfoR GENERATING iGEAR TEETii o. s. SIMMONS Filed Ilarch 51. 1926 18 Sheets-Sheet 15 INVENTOR.

March 25, 1930. o. a. SIMMONS 1,752,033

METHOD AND APPARATUS' FOR GENERATING GEAR TEETH Filed March 51 1926 1a Shets-Shet 16 arz March 25, 1930. o. G. s|MMoNs r 1,752,033

METHOD AND APPARATUS FOR GENERATING GEAR TEETH Filed March 31, 1926 18 Sheets-Sheet 18 i 'W @m apparatus for grinding Patented Ma. 25, 1930 -;m1-m l STATES onrvnn a. summons,

PATENT OFFICE or naxiwoon, onro mnrnon um arraaa rus. ronennma'rfim emu TEETH Application and ain :1, m. serial no. as,7a1.'

My invention relates to a method of and the teeth of gears and gear shaped cutters, adapted tooperate Q of action, or the moulding oneither the describing generating principle neratmg princlple of action to produce "t e true curvature of predetermined form on the teeth of gears and gear shapedcutters.

In a "machine of this character, it is essential that the interrelation of the movements be co1related,'positive and of precise magnitude.

One of the main objects of the present incorrelated by ositive mechanical means.

A further 0 ject of the invention is to provide a cam to actuate the work to enable the machine to operate on the describing generatin principle oi action to produce a curved toot on the gear or gear shaped cutterscorgear, gear sha ed cutter and the like thereotilinear pat of movement of the work with respect to the cutting element.

F Another object of the invention is theprovision'of an adjustment whereby helical teeth may be. produced in gears, gear-shaped cutters'and the like, such result preferab y being eflec ed by adjusting the cutting element ang larly with respect to the axis of the work.

Further objects of the invention reside in the means for indexing the teeth of the gear'and gear shaped cutters so that each tooth; of the gear is successively operated upon to generate the parallel curved surfaces ofthe' teeth with precision as to contour and exact duplication of the'measure of the s ace between the teeth as measured on the' ase circle of the gear or gear shaped-cutters; of

means to actuate the cam correlated to the iaforesaid indexing means; of means to'cause the work to travel in a rectilinear path predetermined to" produce gear teeth curvatures responding in characteristics ,to the curva-/ corresponding to the cam in thedescribing generating principle of action, and 1n accordture of the cam. Y

Another object of the invention is-to pro- "vide a. cam to actuate the work to enable or less ma ,in the provision of an adjustable roller abutthe machine to operate on the moulding generating principle of action to produce curves on the teeth of the gears and gear shaped cutters of the same general-characteristics as the curve ofthe em, but of greater itude as desired. A still furtherobject of the invention re-' sides in theprovision in. a machine sof the character set Vforth, of a spiral cam to actu-.

ate the work to enable the machine to operate on the moulding generating principle of action to produce any one of an infinite number of involute curves in the teeth of gears,

gear-shaped cutters and the like.

A further objectof the invention resides in the provision of adjustable means for controlling flank fullness ears, gearshapedcutters and the like as. or example ment for-the cam. q

. A'further object of the invention resides ance with the curvatures desired, with respect to the cam used in the machine, when it is adapted to operate on the moulding generating-principle of action; of means to advance or retard the work independently of the indexing means; of adjustable means to remove metal from each side of the tooth of the gear orgear shaped cutters; of means to the invention may be said to comprise the method and the embodiment of the method in the structures illustrated in the accompanyin drawin ,hereinafter described and partic arly set orth in the appended claims, together with such variations and modifications thereof as'will be apparent to those in the'provislon of means for adjusting to skilledin the art to which the 'invention'f 1 the complemental angle of pressure of the appertains.

toward the left hand end of Reference should be made to the accompanying drawings forming a part of this specification; wherein Fig. 1 is a front view in elevation of the machine as it is adapted to operate on the moulding generating principle of action.

Fig. 2 is a front view in elevation of the machine as it is adapted to operate on the describing generating principle of action.

' Fig. 3 is an end view in eleFvation looking Fig. 4 is a vertical section taken on line 4-4 of Fig. 2.

Fig. 5 is a plan view of the device for pcsitioning the cutting element spindle angularly with respect to the work spindle.

Fig. 6 is a section. on line 6-6 of Fig. 5.

Fig. 7 is a full sized view of the wormand the minutes of the degree range drum shown in Fig. 5.

Fig. 8 is a side elevation of the pointer which cooperates with the degree range drum as shown in Figs. 5 and 6.

Fig. 9 is a horizontal sectional view of the cutting element spindle, showing the means for supporting'the cutting element with its face in a fixed position with respect to the axis of the work spindle.

Fig. 10 is an enlarged view of the cutter truing and sharpening device.

Fig. 11 is a side elevation of the parts shown in Fig. 9.

Fig. 12 is a section on line 12-12 of Fig. 9.

Fig. 13 is aschematic view in perspective showing the belt and pulleys through which the cutter spindle is driven from a motor located in the base of the machine.

Figs. 14 and 15 (Sheet 4) are detail views 3 showing the supports for the idler pulleys 'supportin shown in Fig. 13.

Fig. 16 is a perspective view illustrating the arrangement of the members throug which an oscillating movement is transmitted to the cam carrying sleeve from a continuously driven, shaft.

Fig. 17 is a view in elevation of the rack shaft forming a part of the cam actuating mechanism.

Fig. 18 is a, section on line 18-18 of Fig. 17.

Figs. 19 and .20 are sectional detail views showing the adjustable connection between the rack shaft and the actuating disk, Fig. 19 being a section on line 19-19 in Fig. 17 and Fig. 20 being a section on line 20-20 in Fig. 19.

Fig. 21 is a central vertical section through the worm gear and disk shown in Fig. 16.

Fig. 22 (Sheet 7) is a vertical section through the b ligotalaxis of the work spindle Fig. 23 1s a detail view showing theworm 23 adjusting the work spindle supporting 24 is .a front elevation of the index housing connecting'rod and includes a movework spindle supporting bed with the dust covers in place and the work spindle, swivel bearing and crank shaft in section, the swivel member 170 being shown adjusted to an angle of 20 to the horizontal.

' Fig. 27 isa front elevation partly in fragmentary section showing the cam for actuating the work spindle and the abutment with which the cam cooperates.

Fig. 28 is a fragmentary plan view of the work spindle actuating cam shown in' Fig. 2

Fig. 29 is a side elevation partly in section of the yvork spindle of the machine.

Fig.30 is a fragmentary view partly in side elevation and partly in section of the index housing as viewed from the side of the work spindle opposite that shown in Fi 29. Fig. 31 is a view in elevation of the rout of the index mechanism housing with the cover removed, the spindle being shown in section.

Fig. 32 is a section on line 32-32 of Fig. 31.

Fig. 33 is a detail view showing the worm by means of which the work spindle may be adjusted angularly with respect to the cam. .lFig. 34 is a section on line 34-34 of Fig. 3

the gear shaped blank s shown in side elevation and the cutting element is shown in section in the position with respect to the blank which it occupies when removing metal from the face of a tooth. f Fig. 37 is 'a plan view of the cutting element and blank shown in Fig. 36. I

-'Figs. 38 and 39 show modified forms of cam and abutment, Fig. 38 showing a plane face abutment adapted to replace the roller abutment, and Fig. 39 showing a cam having a spiralface formed on'a curve other than an involute and a point abutment cooperating therewith.

If a plane surface be given a continuous rotary movement about a given axis, and a member having a point contact with the sur- 'face, be given a continuous movement along from the axis of rotation, the curve traced: by the point upon the surface will be one of the many curves included in the known as s irals.

If the point he moved at a uniform rate general class 

